Numbers of differentially methylated genes for each contrast in different gene regions.

1WRRh, WRRl, XHh, and XHl indicated the group of Recessive White Rock with high body weight, Recessive White Rock with low body weight, Xinhua Chickens with high body weight, and Xinhua Chickens with low body weight, respectively. For each contrast, up meant that there were greater peaks in the second group than the first group within the same region, whereas down meant there were greater peaks in the first group than the second group (p value<0.01).